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Optimization of winter road maintenance energy costs in Sweden: a critique of site specific frost warning techniques
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
2012 (English)In: Meteorological Applications, ISSN 1350-4827, E-ISSN 1469-8080, Vol. 19, no 4, 443-453 p.Article in journal (Refereed) Published
Abstract [en]

Frost formation on roads may cause slippery conditions and thereby increase the risk of accident occurrence. Roads are often treated with preventive operations using de-icing agents (e.g. road salt), which are ideally planned and performed prior to frost formation. The decisions on when and where to treat different road stretches with salt are based on meteorological measurements and forecasts. This paper investigates how uncertainties in meteorological measurements for frost prediction at road weather stations affect the efficiency of winter road maintenance. Different types of uncertainties and errors are discussed, together with potential solutions. The effects on winter road maintenance efficiency are discussed in terms of energy and cost. It was found that improvements in frost warning accuracy and reliability can lead to considerable savings and more efficient winter road maintenance.

Place, publisher, year, edition, pages
2012. Vol. 19, no 4, 443-453 p.
Keyword [en]
hoar frost, winter road maintenance, energy costs, sensors
National Category
Physical Geography Meteorology and Atmospheric Sciences
URN: urn:nbn:se:kth:diva-84752DOI: 10.1002/met.275ISI: 000312147800007ScopusID: 2-s2.0-84870657901OAI: diva2:499588

QC 20130110

Available from: 2012-02-13 Created: 2012-02-13 Last updated: 2013-01-10Bibliographically approved
In thesis
1. Measurements for winter road maintenance
Open this publication in new window or tab >>Measurements for winter road maintenance
2012 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Winter road maintenance activities are crucial for maintaining the accessibility and traffic safety of the road network at northerly latitudes during winter. Common winter road maintenance activities include snow ploughing and the use of anti-icing agents (e.g. road salt, NaCl). Since the local weather is decisive in creating an increased risk of slippery conditions, understanding the link between local weather and conditions at the road surface is critically important. Sensors are commonly installed along roads to measure road weather conditions and support road maintenance personnel in taking appropriate actions. In order to improve winter road maintenance, more precise information about road surface conditions is essential. In this thesis, different methods for estimation of road weather are developed, discussed and tested. The methods use the principles of infrared thermometry, image analysis and spectroscopy to describe ice formation, snow accumulation and road surface wetness in specific patches or along road sections. In practical applications, the methods could be used for better planning of snow clearing operations, forecasting of ice formation and spreading of road salt. Implementing the proposed methods could lead to lower maintenance costs, increased traffic safety and reduced environmental impact.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2012. x, 45 p.
Trita-LWR. PHD, ISSN 1650-8602 ; 1069
winter road maintenance; sensors; infrared thermometry, energy efficiency, road salt
National Category
Other Civil Engineering
urn:nbn:se:kth:diva-105152 (URN)978-91-7501-566-8 (ISBN)
Public defence
2012-12-07, V1, Teknikringen 76, KTH, Stockholm, 10:00 (English)

QC 20121116

Available from: 2012-11-16 Created: 2012-11-16 Last updated: 2013-09-02Bibliographically approved

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